LAMINATE SEALANT FILM

• Main Authors: TAJIMA TOMOKI, KURAMOTO NAOHIKO
• Format: Patent
• Language: English; Japanese
• Published: 16.03.2015
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; HANDLING THIN OR FILAMENTARY MATERIAL; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; STORING; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a laminate sealant film capable of forming a package form having constant openability regardless of a heat seal condition during packaging.SOLUTION: The laminate sealant film is manufactured by laminating a laminate layer (A)/intermediate layer (B)/seal layer (C) in this order, the laminate layer (A) has a thickness of 3 to 50 μm and contains 100 pts.mass of linear low-density polyethylene (A1) and 30 to 300 pts.mass of a polypropylene resin having the melting point of 140 to 165°C (A2), the intermediate layer (B) contains a polypropylene resin (B1) having the melting point of 140 to 165°C and the seal layer (C) contains a low melting point polypropylene resin (C1) having the melting point of 15 to 60°C lower than that of the polypropylene resin (B1) constituting the intermediate layer (B). 【課題】 包装時のヒートシール条件に関わらず、開封性の一定した包装形態を形成しうる多層シーラントフィルムを提供すること。【解決手段】 本発明の多層シーラントフィルムは、ラミネート層（Ａ）／中間層（Ｂ）／シール層（Ｃ）がこの順に積層してなり、厚みが３〜５０μｍのラミネート層（Ａ）が、直鎖状低密度ポリエチレン（Ａ１）１００質量部と、融点が１４０〜１６５℃のポリプロピレン系樹脂（Ａ２）３０〜３００質量部とを含み、中間層（Ｂ）が、融点１４０〜１６５℃のポリプロピレン系樹脂（Ｂ１）を含み、シール層（Ｃ）が、中間層（Ｂ）を構成するポリプロピレン系樹脂（Ｂ１）よりも１５〜６０℃低い融点の低融点ポリプロピレン系樹脂（Ｃ１）を含むことを特徴とする。【選択図】 図２